The office fell silent, and Qiao Anhua frowned in thought.

Pang Xuelin looked at Qiao Anhua with a smile, patiently waiting for the other party's response.

After a long while, Qiao Anhua raised his head again, looked at Pang Xuelin with some incredulity, and said, "Professor Pang, how did you come up with this?" ”

Pang Xuelin said: "Inert neutrinos, this is not a new concept, is it?!" ”

In fact, as early as the end of the 20th century, some scientists put forward similar conjectures, but most scientists at that time regarded the inert neutrino as the fourth neutrino independent of the electric neutrino, the Miao neutrino, and the Tao neutrino, but Pang Xuelin proposed it as a medium neutrino when the three neutrinos were converted into each other, but it was the first time.

This is exactly the theory that Pang Xuelin saw from the neutrino paper in the world of "Whale Song", where experiments have indirectly proved the existence of inert neutrinos, but they have not been directly observed.

In the real world and in the Earth Cannon world, research on inert neutrinos is even more blank.

Jo Anhua took a deep breath and said: "Inert neutrinos are indeed not a new concept, I remember that decades ago, in the physics community, inert neutrinos were candidates for thermo-dark matter, physicists thought that they did not participate in any interaction other than gravity, when the IceCube neutrino observatory tried to find such neutrinos, but has not been able to find inert neutrinos in the expected value range...... After so many years, the theory of inert neutrino correlation has remained a mystery, and over the years, with the improvement of neutrino observation accuracy and the large-scale application of neutrino communication, physicists have never been able to observe the existence of a fourth neutrino. Now in the world of physics, basically no one studies this thing anymore! ”

Pang Xuelin nodded and said: "Indeed, the existence of inert neutrinos has always been controversial in the physics community, but the fact that it has not been observed in the laboratory does not mean that inert neutrinos do not exist. ”

Qiao Anhua frowned and said, "Professor Pang, do you have any evidence?" ”

Pang Xuelin smiled slightly and said, "The first evidence is the paper I just showed you!" ”

Pang Xuelin pointed to the manuscript paper on the table.

This is a theoretical model of inert neutrinos that he calculated mathematically on the basis of his papers on the world of "Whale Song".

It is precisely because of this impeccable theoretical model in mathematical logic that Qiao Anhua listened to Pang Xuelin for so long.

If it had been a different person, he would have walked away a long time ago.

Pang Xuelin paused and continued: "As for the second evidence, Professor Qiao, you should have heard of the Daya Bay Nuclear Reactor Neutrino Experiment Team, right? ”

Qiao Anhua couldn't help but be stunned, and said loudly: "Of course, the Daya Bay neutrino experiment is one of the most successful basic physics achievements in China at the beginning of this century, this experiment successfully found the third neutrino oscillation mode, leaving an indelible contribution in the history of physics, and the current Neutrino Research Center of the Chinese Academy of Sciences was established on the basis of this team, and even the address is at the original site of the Daya Bay Nuclear Power Plant!" ”

Pang Xuelin suddenly laughed and said, "Professor Qiao, do you know that the Daya Bay Nuclear Reactor Neutrino Experiment Team has another achievement in addition to finding the third neutrino oscillation mode?" ”

"And one more result? What is the result? ”

"It was a paper published in February 2016 by the Daya Bay Neutrino Experiment team, which stated that the number of anti-electric neutrinos collected was 6% lower than the theoretical prediction. Although it sparked a certain amount of discussion in the physics community at the time, it did not cause much of a sensation. Later neutrino studies have not mentioned this paper, but it has revealed the fact that some counter-electric neutrinos may have been transformed into inert neutrinos that cannot be detected. ”

Pang Xuelin said as he stood up, came to the windowsill, looked at the tall buildings under the neon in the distance, and continued: "13.8 billion years ago, after the Big Bang, there was an ocean of light, and positive and antimatter continued to annihilate each other and convert into high-energy photons. As the universe expands and cools, antimatter dies completely, leaving behind a world of matter. The standard theory of the origin of the universe holds that matter and antimatter were created in pairs or equal quantities at the beginning of the Big Bang. So how did primordial antimatter disappear? Professor Qiao, would you be interested in working with me to uncover this secret? ”

Qiao Anhua's eyes widened, and his breathing gradually became rapid.

He knew what Pang Xuelin wanted to say.

Because the answer to this question that Pang Xuelin said is likely to exist in neutrino oscillations!

Normally, to fully characterize neutrino oscillations, six parameters are required.

θ12、θ23、θ13、(Δm21)^2、(Δm32)^2、δCP。

where θ is the mixed angle, which represents the amplitude of the oscillation, θ12 is the amplitude of the first generation neutrino and the second generation neutrino, and so on; (Δm21)^2 is the square difference between the masses of the second-generation neutrinos and the first-generation neutrinos, representing the frequency of the oscillation; δCP is the CP destruction phase angle, which indicates the difference in the probability of neutrino oscillations between the positive and negative neutrinos.

At present, five parameters θ12, θ23, θ13, (Δm21)^2, (Δm32)^2 have been measured, and the last CP is left to destroy the phase angle δCP, which has always puzzled the physics community.

This CP is the conservation of electric charge.

C is the conservation of electric charge, P is the conservation of cosmology, scientists have proved that CP is destroyed, δ is the destruction phase angle, if it is measured to be very large, it can be pointed out that it is neutrino destruction.

Over the years, scientists have tried to measure the size of the δ, but have never been able to do so.

Although θ13 measured in the Daya Bay experiment gives signs of maximum CP destruction, some scientists even believe that δCP may be 270°, as long as this is the case, it can be proved that neutrinos cause the asymmetry of positive and antimatter, and matter defeats antimatter.

But after so many years, this is still only a conjecture, and physicists have devised many schemes, all of which have failed to measure the magnitude of δCP.

Plus the six percent of neutrinos lost in the Daya Bay experiment.

The cloud that hangs over neutrinos has puzzled physicists for generations.

However, if, according to Pang Xuelin's theory, neutrinos between different flavors need to be converted into each other through an inert neutrino, then all problems will be solved!

It can even help humanity find the dark matter of their dreams!

Such an achievement will make a big step forward in the basic physics of mankind, and any scientist who participated in this research will go down in history.

This is also the reason why Qiao Anhua became so excited after Pang Xuelin said this.

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